Scale lock



0G11. 4, 1932- c. a. HASKHNS SCALE LOCK FIG. L

@en 4, 932. C. Hfsmms SCALE LOCK Film1 July '2.3. 1930 ZSheets-Sheet 223a/Wenko@ @4km/maag Patented Oct. 4, 1932 vkUNITED STATS PATE?? OFFlCCLIFFORD B. HASKINS, OF DAYTON, OHIO, vaS55111110112 TO DAYTON SCALEGQ11133111' Y, OF DAYTON, OHIO, A CORPORATION 0F NEW' JERSEY SCALE LOCKApplication filed July 23,

This vcase relates to weighing scales and particularly tolocking devicesfor use when transporting the scale or when it is otherwise desired toprevent movement of the scale parts.

The object of the invention is to provide an improved locking device forlocking the levers ofthe scale against movement when not in use therebypreventing injury to the bearings of the levers due to shocks anddisturbances such as occur in moving` the scale.

Further the object of the invention is to combine such a locking meanswith a pendulum counterbalancing system in such a manner that thependulums will be free to move in one direction.

Still further the object of the invention is to provide such a lockingdevice in which the lever connected tothe pendulums by means of a. tapeis locked in such a position that the strain on the tape is negligible.

Various other objects and advantages of my invention will be obviousfrom the fol l lowing particular description of one forml of mechanismembodying the invention or from an inspection of the accompanyingdrawings; and the invention also constitutes cert-ain new and novelfeatures of construction and combination of parts hereinafter set forthand claimed. v

In the drawings:

Fig. 1 is a vertical section through a portion of the weighing machine,and

Fig. 2 is a detail of the locking device as applied to the intermediatelever.

In detail7 the draft rod 10 connected to any suitable base lever systemor load support engages a stirrup 11 having a knife edge bearing on theintermediate lever 12 fulcrumed at 13 on a frame piece 111. The usualdash pot devicel is connected to the lever 12 to dampen the oscillationsof the lever when the load is applied or removed from the scale. Theleft hand end of the lever 12, as viewed in Fig. 1, is connected to astirrup element 16 attached to the lower end of the tape 17 the upperend of which engages and is fixed to the periphery 18 of the pendulumdevice 19 and to the periphery 20 of the intermediate transmission lever21. A

1930. Serial No. l/(2,057.

second tape 22 connects the lever 21 with the periphery 23 of thependulum device 24. The counterbalancing system is supported by a frame25 to the sides of which are fixed resilient arc-shaped elements 26adapted to limit the movement of the 'pendulum balls 27 away from eachother. Connected to tl e 'transmission lever 21 is a rack member 28 eniga pinion 29 for driving the indicator' shown).

(not

Tie locking device consists of a b ll lcv-er 30 pivoted at 31 to theframe of the scale. Each end of the bell crank 30 is provided withcushioning material 32 adapted to engage the .ide ef the scale housing'Bil. Eccentrically pivoted 'to the bell lever 30. is a link 36 pivotedits other end to a lever 37, the lower end of i i i is adapted to engagethe upper edge of lei-'er 12 to prevent its rotation counterclockwise.

In the full line position shown in Figs. 1 and 2, the bell lever 30 hasbeen rotated by means of a suitable crank handle located on the outsideof the scale housing to the locking position. rlhus the lever 12 whichis normally in a substantially horizontal positien has .been actuated bythe lever' clockn wise until the lug 8S on the left hand arm of lever 12engages lixed lug 39. 1n this position thependulums 27 no longer exertany tension on the tape 17 and the pendulums 27 freely hang vertically.If during transportation, they swing outwardly, they engage resilientmembers 2G. The lever 12 tends to remain in contact with lever 37 by theaction of gravity. When in the full line position shown in the drawingsthe link 36 is located on a line, the extension of which passes belowpivot 31 of the latter. Thus the tendency of the lever 12 to return toits initial position exerts a force 'tending to hold bell lever 30 inlocked position. This action is further assisted by a spring 411connecting lever 87 and fixed lug 39. 1n order to release the lever 12from the lever 37, the bell lever 30 is rotated counter-clockwise bymeans of the handle thereby moving the lever 87 counterclockwise andreleasing' it from the lever 12. The latter is thereby free to moveunder the impulses of the load to a limit determined. by a pin 13.

" pendulum inv one When in unlocked position (as shown in dotted linesin Fig. 2) the link 36 isV on a line, the extension of which passesabove pivot 31 thus tending to hold the bell lever 30 in unlockedposition.

lVhile there has been shown and described and pointed out thefundamental novel :teaiures or the invention as applied to a singlemodification, it will be understood that various omissions andsubstitutions and changes in the form and details of the deviceillustrated and in its operati-on may be made by those skilled in theart without departing from the spirit of the invention. It is theintention therefore to be limited only as indicated by the scope of theliollowing claims.

I claim:

l. In a scale, a scale lever and locking` means therefor comprising abell lever, a link connected thereto, and a pivoted element connected tothe link, the link being in a line to exert a force for holding the belllever in locking position when the pivoted element has bee positioned inengagement with the scale lever to lock the latter.

2. In a scale such as described in claim l, and said link being in linefor exerting'a torce 'tending to hold the bell lever in inlockedposition when the pivoted element has been moved to unlock the scalelever.

3. In a scale, a scale lever, and looking means therefor including anelement for engaging the scale lever and a bell lever for operating theelement and having one end adapted to abut a iiXed member when inlocking position and the other end adapted 'to abut ya lixed member whenin unlocking position.

1l. In a scale, a counterbalance system including a pendulum, operatingmeans therefor, means 'for at will rendering the operating' meansineilective to operate the pendulum, and a resilient member engageablewith the pendulum when the latter swings to one side of its normalposition.

In a scale, a scale lever, a toggle linkage includingv a pivoted elementfor locking the scale lever, uaid linkage being manually adjustable tolock or unlock the lever by means of said pivoted element, and a springYlor urging vthe toggle linkage in a direction to hold it in eitheradjusted position.

6. In a scale,l a tension member, a pendu-- lum connected thereto, abeam connected to the tension member, a locking' device for rocking thebeam in a direction to decreasethe pull thereof on the tension memberand leave the pendulum free to rock tree of the tension member, and aflexible stop for resilientljyT limiting the 'free rocking movement ofthe direction.

7. In a scale, load-responsive beam, a pair of pendulum counterbalances,operating connections between the beam and the counterbalances formoving the latter in opposite .directions upon a single movement of thenature.

CLIFFORD B. HASKIN'S.

